An Ukrainian Security Service officer was shot dead in Kyiv on Thursday morning in what authorities told CNN was an apparent assassination.

A spokesperson for the service told CNN that an SBU officer was killed in Kyiv and that investigation into the assassination was underway. The SBU did not release any further details about the officer’s identity.

Silent CCTV footage purportedly showing the attack was shared on local Telegram channels. CNN cannot independently verify the footage, but its location matches official photographs from the scene released by Kyiv Police.

The clip shows a man walking out of an apartment building in the Ukrainian capital in broad daylight. He is seen carrying a couple of bags and heading towards a car parked nearby, when he is approached by a masked individual who appears to be holding a gun. The attacker appears to fire the gun and the man with the bags collapses to the ground. A bystander is seen running away from the scene.

The masked attacker then appears to fire again before fleeing the scene.